Tool for pneumatic hammers.



H. KELLER. TOOL FOR PNBUMATIC HAMMERS. APPLIoATroN FILED AUG. s, 1912.

1;;0881 54, Patented 11611.24, 1914 wieg/22,44' 4 QHENnYr-nnnnnni or cHreAGo; rLINors.

n y.moonsnon@terminarlomarianna Y Spe'cietion of Letters Patent."

Amaintien :ii-antigua s, 1912. serial m. 71u01.

To all whom 'it may conc-ern: 1 Be it known that I, HENRY Kemna'a citizen of the United States, and a resident ofthe city of Chicago, countyof Cook, and

State of Illinois, have invented certainlnew and useful' Improvementsfi?Toolsffior Pneumatic Hammers, of whiclrthezffollowing. is

' stricted portion 4 'an aspecification. A

)My invention relates tdaimpr'ovements in tools for pneumatic: hammers` andi' the?. llike and has for its object .the'rfprovisionoof an improved tool of this;eliaracterf which is tool embodying my invention, and Fig.V 2

is a section of said tol taken ion line .fe--w of Fig. l.

The preferred form of construction as aillustrated in the drawings comprises a tool head 1 recessed at one end for the reception of a tool shank 2. The rec in head 1A is made cylindrical in form and is provided with' an outer larger (portion 3, an innerf'con I 5 locatedijust beyond theonstrictedportion 4; The tool :shank 2 .fis made cylindrialjn rangemen f; blows oflthehammer areap'pliA ankiofthei tool 'in .the usual m Ainner end ofthe shank spreads uligement 5 and` thus securely lockfsgftneV shank in the head. By this arrangernentY it will be observed that theV .inner end of Vthe,shank will be llockedse-V i curely in the headwhereas the adjacent portion ofthe shank will have aslight looseness or freedom of movement therein, and I have found by experience that this arrangement tends to prevent the snapping off a'locking enlargement' of the tool shank where it hits the tool head and -thus prolongs the life of the tool.V The tool head illustrated in the drawing is an ordinary rivet, but it is obvious that any other. form of tool head may be secured to 4`'t-'lieshank in the same manner.

WVliile I have illustrated and described fthe pleferredform of construction for carrying flnyinvention into effect, this is capable y,of

mgfzfroln the spirit of the invention. I,

Wherefore, d o'not wish tobe limited to the `@exact details as set forth but desire to avail llniyself of such variations and modifications was-come within the scope of the appended, clairns l .fHaving described claim as new and desire to secure by Let-ters Patent is:

1. A tool of the class described comprising' Y n a tool head'having a. recess therein; and a t'ool shank passing loosely` into said recess and rigidly secured atl its inner end to said heade substantially as described..

Patented Feb. 24, 1914..

variation and modification without departj invention, what il'. 555-' 2.- A tool of the class described comprising i a tool head having` a recess therein, said ref cess being constricted at its inne-r' portion;

and a tool shank passing loosely through the outer portion o". said recess and kti, l1tlgv .fit

3. vAtool of the class described comprising .a tool lhead havi cess being constructed at its inner z said.constricted nortion; and a ztool shank Pass" .loosely ,throu 1 the router ,portion of Vsai recess ti ftly 'the .inner tmlle inner portion, substantial'lg,Y as iler scrl a recess therein, said rertion Vandihaving a locking enlargement' eyond portion, theinerend loi 'shank lbeing to fit said enlargement, Lsubstantially s dem a In testimony -wh'ereof I havesigned my name to this specification inthe presence of two subscribing witnesses. A 1

Y HENRY KELLER. `Vitnessesn Y An'rimn A. Orson, i Josuun R. H. Po'rrs. 

